Acknowledgments

The material presented in this book is a collection of many years of research and development by the authors in the Department of Electrical and Electronic Engineering, The University of Hong Kong.

We are grateful to all members of our research group, especially Mr Wenlong Li, Miss Jiangui Li, Miss Shuang Gao, and Miss Diyun Wu, for their help in the preparation of this work. We must express our sincere gratitude to our PhD graduates, namely Dr Jihe Chen, Dr Yuan Gao, and Dr Shuang Ye, who have made enormous contributions to the area of chaos in electric drive systems.

We are deeply indebted to our colleagues and friends worldwide for their continuous support and encouragement over the years. We appreciate the reviewers of this book for their thoughtful and constructive comments, and thank the editors at John Wiley & Sons for their patience and effective support.

Last but not least, we thank our families for their unconditional support and absolute understanding during the writing of this book.